﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _14_Console
{
    // 引用类型，接口d
    public interface IPay
    {
        /// <summary>
        /// 定义了一个规范
        /// </summary>
        /// 

        // 默认public 
        void Pay();
    }
}
